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高效薄膜蒸发器

  • 高效薄膜蒸发器

高效薄膜蒸发器

  • 本薄膜蒸发器机组由蒸发器.汽液分离器、预热器三部分和一只简易分离器组成 ,蒸发器为升膜式列管换热器。该蒸发器具有生产能力大、效率高、物料受热时间短等特点,本设备适用于制药、食品、化工等行业的稀溶液浓缩,本设备与物料接触部分均采用不锈钢制造.具有良好的耐腐蚀性能,经久耐用,符合药品卫生要求。

详细信息

高效薄膜蒸发器的优点:
1.极小的压力损失
在高效薄膜蒸发器中,物料流与二次蒸发汽流是两个独立的通道∶物料是沿蒸发筒体內壁降膜而下;而由蒸发面蒸发,蒸汽则从筒体中间的空间几乎是无阻碍地离开蒸发器,因此压力损失是非常小的。
2.可实现真空条件下的操作
正由于二次蒸气由蒸发面到冷凝器的阻力很小,使得整个蒸发筒体内壁的蒸发面维持较高的真空度,几乎等于真空系统出,口的真空度,由于真空度的提高,有效降低了被处理物料的沸点。
3.高传热系数,高蒸发强度
增大了与热介质的温度差;呈湍流状态的液膜,降低了热阻;同时抑制物料在壁面上结焦、结垢,也提高了蒸发筒壁的传热。
4.低温蒸发
蒸发筒体内能维持较高的真空度,被处理物料的沸点大大降低,因此特别适合热敏性物料的低温蒸发。
5.过流时间短
物料在蒸发器内的过流时间很短,约10秒左右;对于常用的活动刮板而言,其刮动物料的端面有导流的沟槽,其斜角通常为45σ,改变斜,角的角度,可改变物料的过流时间,物料在刮板的刮动下,螺旋下降离开蒸发段。缩短过济,有效防止产品在蒸发过程中的分解。
6.可利用低品位蒸汽
蒸汽是常用的热介质,由于降低了物料的沸点,在保证相同4t的条件下,就可降低加热介质温度,利用低品位的,有利于能量的综合。
7.适应性强,操作方便
结构设计非常特殊,使该产品可处理一些常规蒸发器不易处理的高粘庋、含颗粒、热敏性及易结的物料。   

 

Advantages of a high efficiency thin film evaporator:
1. Minimal pressure loss
In the high-efficiency thin film evaporator, the material flow and the secondary vaporization flow are two independent channels: the material falls under the inner wall of the evaporation cylinder; while the evaporation surface evaporates, the steam is almost from the space in the middle of the cylinder. It leaves the evaporator unimpeded, so the pressure loss is very small.
2. Can realize the operation under vacuum conditions
Because the resistance of the secondary vapor from the evaporation surface to the condenser is small, the evaporation surface of the inner wall of the entire evaporation cylinder maintains a high degree of vacuum, which is almost equal to the vacuum system, and the vacuum degree of the mouth is effective due to the improvement of the vacuum degree. Reduce the boiling point of the material being processed.
3. High heat transfer coefficient, high evaporation strength
The temperature difference with the heat medium is increased; the liquid film in the turbulent state reduces the thermal resistance; at the same time, the material is inhibited from coking and scaling on the wall surface, and the heat transfer of the evaporation cylinder wall is also improved.
4. Low temperature evaporation
The evaporation cylinder can maintain a high degree of vacuum, and the boiling point of the material to be treated is greatly reduced, so it is particularly suitable for low temperature evaporation of heat sensitive materials.
5. Short overcurrent time
The overcurrent time of the material in the evaporator is very short, about 10 seconds; for the commonly used movable scraper, the end surface of the scraping material has a guiding groove, and the oblique angle is usually 45σ, changing the inclination and the angle. The angle can change the overcurrent time of the material. Under the scraping of the scraper, the spiral descends away from the evaporation section. Shorten the economy and effectively prevent the decomposition of the product during the evaporation process.
6. Available low grade steam
Steam is a commonly used heat medium. Because the boiling point of the material is lowered, the temperature of the heating medium can be lowered under the condition of ensuring the same 4t, and the use of low grade is beneficial to the integration of energy.
7. Adaptability and easy operation
The structural design is very special, allowing the product to handle high-viscosity, granule-containing, heat-sensitive and easy-to-knot materials that are not easily handled by conventional evaporators.

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